Stop block



Dec v j Filed Oct. 1. .1925

JJROW Federated Dec. il, '1.923.

narran JOHN JOHNSON, OF PLYMOUTH, PENNSYLVANIA.

STOP BLOCK.

Appncation inea october 1, 1923. serieu No 665,876.

To all whom it may concern Be it known that l, JOHN JOHNSON, a citizenof the United States, residing at Plymouth. in the county of Luzerne andState of Pennsylvania, have invented certain new and useful Improvementsin Stop Blocks, of which the following is a specification.

This invention relates to a stop block, and particularly to aconstruction disposed to engage a car wheel in its travel over atraction rail in order to prevent further movement of the car thereon.In previous constructions of this character the block is mounted foroperation in only one direction so that the device is limited in thescope of its application for different conditions in railroad operation.Such blocks are also mounted for a free rotary movement and the travelthereof is not positively limited when the lrblock is in engagingposition, while the strain of impact with the car wheel is borne by thepivot of the block and it is important that this pivot be of fixedcharacter in order to secure accurate alignment of the block with therail tread when it forms a section thereof.

The invention has for an object to provide anovel and improvedconstruction of stop block having opposite wheel Contact faces either ofwhich is adapted to be shifted into position for use whereby areversible stop is provided to prevent movement of a car upon a rail inopposite directions.

A further object of the invention is to provide a construction of Iblockhaving a fixed pivot and an abutment face at one side thereofdisposed tocooperate with a similar face upon a base to positively limit the travelof the block when in contacting position and to provide a rigid supportfor the wheel pressure thereon disposed in a direct linev from the pointof wheel contact.

Other and further objects and advantages of the invention will behereinafter set forth and the novel features thereof defined by theappended claims.

1n the drawing Figure 1 is a side elevation showing the inventionapplied;

Figure 2 is a section on line 2 2 of Figure 1;

Figure 3 is an enlarged detail on line -3-3 of Figure 2.

Like numerals refer to like parts throughout the several gures of thedrawing.

This invention is adapted for application in connection with the usualtraction rails for cars and is herein shown as comprising a section ofthe tread of such rails although not confined to such specificapplication. In the present disclosure of the invention the numeral 10designates a base plate which may be of any desired size orconfiguration and preferably extends beneath the traction rails 1l whichare supported at their adjacent ends thereon as shown in Figure 3. Thisbase is provided at proper positions with a bearing block 13 andcooperatin cap plate 14 to receive the rotatable sha t 15 which carriesthe stop block 16 secured thereto in any desired manner. A desirableform of such attachment comprises a locking key 17 upon the shaftextending through a similar aperture in the block so as to effectuallykey the block upon the shaft.

The portion of the shaft which is supported by the bearings is ofcircular configuration, as usual, and the end of the shaft which carriesthe operating levery 18 is also formed of angular cross section, asindicated at 19 in Figure 1, which receives an angular socket 2O carriedby the lever 18. The upper face 21 of the stop block 16 comprises atread portion cooperating with the tread of the rails 11 so that when inhorizontal position as shown by full lines in Figure 3 a continuous railtread isA formed.

For the purpose of adapting this block for operation in reversepositions to hold a car against movement in opposite directions, theblock is provided at opposite sides of its axis with abutment faces 22preferably of inclined character adapted to cooperate with a similarface 28 upon the base 10. The face 23 terminates at its lower portion ina pit 241 adapted' to receive any dirt or foreign matter which may enterthe block mounting` so as to prevent clogging of the action of theblock. It will be seen that the movement of projecting one end of theblock causes the opposite end to ride downward into contact with theseat 23 and such movement With the abutment faces at the opposite sidesof the block so that the strain of impact and the pressure of the carivhecl pressure.

against the block is carriedl by the abutting faces and the pivot shaftrelieved of such As a result the shaft can always be freely turned toshift the block even though the car Wheelis resting in contacttherewith.

Any preferred means may be used for shifting the block in its oppositepositions or maintaining it level to form a continuo-us treachand l haveshown a preferred form in the lever 18 which is held in its adjustedpositions by means of a spring actuated latch bar 26 adapted to bereleased by a handle 27 and to engage a series of sockets 28 in thesector 29 supported by standards 30 from the base l0. Y

The invention is adapted for application to either or both rails, and isshown in Figure? as comprising a Vplurality of the stop blocks mountedfor cooperation with the parallel rails.

vThe operation of the invention will be apparent from the foregoingIdescription,

A'and it Will be seen that when the lever is4 in the central position ofFigure l a substantially continuous rail tread is provided, While ifshifted to the dotted line position in-that figure a stop or chock isprovided against the movement of a car wheel toward the right. y

In the reverse position of the block as indicated by dotted lines inFigure 3, the lever is shifted to the opposite position at ltheV left ofthe sector. This provides a. form of stop block adaptednot only forinclined Ways but also for substantially level construction in Which itmay be desired to provent movement of a car in opposite directions suchas upon a switch or similar' rail construction. The construction alsoprov vides means by which the operating lever may be disposed at eitherside of the track as the block is capable of operation in eitherdirection thus avoiding the necessity of separate constructions fordifferent positions of application. The position o-f the abut-- mentfaces forms a positive limit to the upward travel of the contacting endof the stop so that the pressure o-r tendency of the stop to movefurther' by contact with the Wheel is avoided. and such strain removedfrom the controlling' lever, While these abutment faces further receiveand carry the entire' pressure stra-in in order to relieve the pivotsthereof.

lll/'hilo the specific construction of the block and its opera-tingmeans has been herein sho-Wn and described, still the invention is notconfined thereto as changes and alterations kmay be madeWithoutdeparting from ters Patent is 1-1. A stop block provided withopposite Wheel contactV faces, andV means by which either of said facesmay be shifted in position for use. Y a

2. A stop block provided with opposite Wheel Contact faces, means bywhichv either of said faces may be shifted in position for use,v andmeans limiting the movement of said block into such position.

3. A stop block provided Withopposite Wheel Contact faces, means bywhich either of said faces may be ,shifted in position for use, andmeans limitinsr'the movement of said block into such position andproviding a pressure abutment for said block.

4:, A stop block provided With a fixed pivot and an abutment face at oneside therof, and a base provided with a. cooperating face t-olimit thetravel of the block and provide a rigid support for the Wheel pressurethereon. Y

5. A reversible stop-block having a fixed pivot, abutment faces at theopposite sides of said pivot, and a base provided with cooperatingabutments at the opposite sides cf the block pivot. .y

6. A reversible stop block having a fixed pivot., abutment faces at theopposite sides of said pivot, and a base provided with a receivingrecess beneath the block pivot and cooperating abutment faces atopposite sides of said recess.'

7. A reversible stop block pivoted for oscillation in oppositedirections to project either end thereof above an adjacent track rail,an operating lever secured to the pivot of said block, a latch carriedby said lever and retaining means cooperating with said latch to holdsaid block in its horizontal or either of its tilted positions.

8. A stop block comprising a body having a tread upon its upper face,angular abutment faces disposed at the opposite ends of said body, abase having faces to cooperate With said abutments, and a fixed centralpivot secured to said block.V

9. A stop block comprising a. body having a fixed pivot and a tread uponits Vupper face, angular abut-ment faces disposed at the opposite endsof said body, a base hav- 1 ing` faces to cooperate with said abutments,

JOHN JOHNSON.

